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G. H. REYNOLDS 822 T. J. RIDER.

VALVE GEAR FOB. DIRECT 4ATNGr ENGINES.

10.24.1997. Patented oct. 4,1881. Y

K Mlnesses w97 i WQMQYM .auf a `7 UNITED STATES- PAT'I-LNTv OFFICE.

GEORGE H. REYNOLDS AND THOMAS J. EIDER, OE NEW YOEK, N. Y.

-VALVE-GEAR FOR DIRECT-ACTING ENGNES.

, SPECIFICATION formingpart of Letters Patent No.247,997, dated October4, 1881.

- applicati@ ait-, 1 July 5,1'Ss1. (No model.)

To. all whom it may concern Be it known that we, GEORGE H. REYNOLDS andTHOMAS J. RIDER, both of the city and -county ofNeW York, in the StateofNew York,

have invented certain new and useful Improvements in Valve-Gear forDirect-Acting. En` gines, of which the following is a specificationf Ourinvention relates to direct-actin g engines, such as are embodied` insteam-pumps, but which may be applied to other purposes, and in` whichthe auxiliary valve is turned partly round or oscillated at each'strokeofthe piston to admitsteam to operate the main valve. An example of suchan engine and valve-gear is shown in our Letters Patent numbered237,323, and dated February 1, 1881. In the engine represented in saidpatent, and in other engines of the' same class, the valve-rod is turnedor oscillated by means of an arm projecting from the piston-rod andacting upon inclines upon the valve-rod, or on a yoke or bar attachedthereto near each end of the pistonls stroke. i

The object of the presentinvention is to obviate an objection which isfound in practice to exist in the construction of the parts asrepresented in the aforesaid Letters Patent, consisting in the cuttingof grooves in the valveoperating arm by its Working during a portion ofits stroke on the edge of the yoke, and also to enable the inclines andthe parts .which act upon them to be properly oiled and removed, for thepurpose of cleaning them When the oil becomes gammed upon them, withoutdisturbing other parts of the valve-gear.

To this end it consists in a novel construction of the yoke and of thevalvearm, and a novel arrangement of anti-friction rollers on the saidarm, as hereinafter described, whereby the above objection is overcome.

In the accompanying drawings, Figure l. represents a longitudinalsection of a portion of a steam pump embodying our invention, and Fig.2represents a transverse section upon the dotted line a0 Fig. l, of thepiston-rod and the valve-rod and its yoke, and an elevation of thepiston-rod arm.

Similar letters of reference designate corresponding parts in bothfigures.

A designates the head and a portion of the steam-cylinder of thesteam-pump, and -B des- Ais connected with the steam -cylinder by atrunk, C, in the usual Way.

D designates the piston-rod, to which the steam and water pistons areattached. and E represents a portion of an auxiliary valve andsteam-chest, which may be of any desired construction, and theframe ofwhich receives an oscillation or partial turning, from the valvejectingfrom the water cylinder..

H designates a vertical arm, which may be rigidlysecured to thepiston-rod D in the desired position by means of a set-screw, a, orotherwise, and which has near-'its upper end an eye, b, through whichthe valve-rodFis inserted.

I designates a yoke, having lugs c at each end, which are fitted to thevalve-rod, and after said yoke has been adjusted into the desiredposition on the rod it may be rigidly secured thereto by means ofset-screws d in the lugs c, or otherwise. The yoke I is slotted for thegreater part of its length, and the top of the arm H projects upwardthrough and above said yoke and. can reciprocate freely therein. Uponthe top of the yoke I are two inclines, e e, the one on one side beingnear one end of the yoke, and the one on the other side being near theother end of the yoke.

Through the arm H, above the valve-rod F, is inserted a transverse pin,f, and .upon said pin, on each side of the arm, are loosely fitted iignates the head ofthe Water-cylinder, which -rod F, which is guided ina standardG, prorollers g, which are free to rotate, and which areimmediately above the two sides of the yoke. As the piston-rod and itsattached arm H are reciprocated the rollers g come alterynately inposition to, and do bear upon,the inclines e, thus turning oroscillating the yoke in onedirection or the other,in accordance with thedirection in which the arm is movin g, and

thus effect the desired turningor oscillation 0f the valve E.

The rollers g constitute,in effect, projections ou the arm H on changingthe sides of the yoke 5 but the rollers are preferable to. rigidprojections, because they lessen the friction upon the inclines e.

By our invention the cutting or excessive Wear of the yoke and the armwhich actuates it are obviated, and the desired motion is trans- IOCmitted to the valve-rod in an easy and positive manner.

Ourimproved construction is advantageous for other reasons. The inclinesupon theyoke are in a plane which is approximately horizontal, onlyvarying slightly therefrom at any time, and hence oil which is appliedto the inclines will remain upon them and will not run of, as it wouldit` the inelines were in planes approximately vertical.

Another advantage is that in case the rollers become guinined up withoil they may be readily removed for cleaning bysimply taking ontv thescrews which retain them in place, andwithoutdisturbingotherpartsofthevalve-gear. Another advantage is thatanytransverse strain exerted upon the yoke, and through it upon thevalve-rod, is in the direction ofthe length of the arm H, and istherefore transmitted to the piston-rod, which, being` of large size,will not be aiccted by such strain.

IVe are aware that a valve-gear has been made in which the valve-rod hasa slotted yoke arranged below and attached to it, and is oseillated byanarin projecting from the pistonrod and working in the slot in said yoke,said arm being provided with afriction-roller for bearing on the yoke.We do not therefore claim lthis as of our invention.

What we claim as our invention, and desire to secure by Letters Patent,is-

1. In a direct-acting engine, the combination,

with the piston-rod and a valve and rod adaptA ed to be oscillated orturned, of a yoke attached to the valve-rod and having inelines uponopposite sides, and an arm projecting from said piston-rod and havinghorizontal projections upon opposite sides above the center ot thevalve-rod, the under sides ot' which are adapted to act upon thcinclines on said yoke, substantially as and for the purpose specified.

2. Inadireet-actingengine,theeombination, with the piston-rod and avalve and rod adapted to be oscillated or turned, of a yoke attached tosaid rod and having inclines on its upper surface, and an arm projectingfrom said piston through and above said yoke, and provided` withhorizontal projections on opposite sides and above the center ot' thevalve-rod, which overhang the sides ot" the yoke and rare adapted to actupon the inclines thereon, substantially as and for the purpose specied.

3. In adirect-acting engine,the combination of the piston-rod D, thevalve E, the rod F, the yoke I, having inclines ec,and the arm H,projecting through said yoke, and provided above the sides ot' said yokeand above the center ot' the valverod with the transverse pin fandrollers g, substantially asspeeitied.

GEO. H. REYNOLDS. THOS. J. RIDER. Witnesses: .f

T. J. KEANE, ED. GLATZMAYER.

